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Finding the Fourth Proportional to 18,660.41, 27,976.02 and 12,722.57

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Solution

The fourth proportional to 18,660.41, 27,976.02 and 12,722.57 is: 19,073.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,660.41 : 27,976.02 = 12,722.57 : x
  2. Step 2: Convert to fraction form
    18,660.41/27,976.02 = 12,722.57/x
  3. Step 3: Cross multiply
    18,660.41x = 27,976.02 × 12,722.57
  4. Step 4: Simplify right side
    18,660.41x = 355,926,790.09
  5. Step 5: Solve for x
    x = 355,926,790.09/18,660.41
  6. Step 6: Final answer
    x = 19,073.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.